MQTT API Reference

Hi there,
my current aim is to create an MQTT controlled Mopidy instance. I use this addin:

So everything is running good, mopidy is receiving play and stop.
My Question is: in that documentation they say to send ‘tunein:station:s48720’ to start a tunein stream.
They do not provide any other examples, but i guess that syntax is already part of an API, right?

What is the syntax to start play a local playlist named “myplaylist”, and where can i read more about those syntax commands?

Best wishes